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-rw-r--r--src/southbridge/amd/pi/hudson/lpc.c342
1 files changed, 342 insertions, 0 deletions
diff --git a/src/southbridge/amd/pi/hudson/lpc.c b/src/southbridge/amd/pi/hudson/lpc.c
new file mode 100644
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+++ b/src/southbridge/amd/pi/hudson/lpc.c
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+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2010 Advanced Micro Devices, Inc.
+ * Copyright (C) 2014 Sage Electronic Engineering, LLC
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <console/console.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pnp.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
+#include <device/pci_def.h>
+#include <pc80/mc146818rtc.h>
+#include <pc80/isa-dma.h>
+#include <arch/io.h>
+#include <arch/acpi.h>
+#include <arch/ioapic.h>
+#include "hudson.h"
+
+static void lpc_init(device_t dev)
+{
+ u8 byte;
+ u32 dword;
+ device_t sm_dev;
+
+ /* Enable the LPC Controller */
+ sm_dev = dev_find_slot(0, PCI_DEVFN(0x14, 0));
+ dword = pci_read_config32(sm_dev, 0x64);
+ dword |= 1 << 20;
+ pci_write_config32(sm_dev, 0x64, dword);
+
+ /* Initialize isa dma */
+ isa_dma_init();
+
+ /* Enable DMA transaction on the LPC bus */
+ byte = pci_read_config8(dev, 0x40);
+ byte |= (1 << 2);
+ pci_write_config8(dev, 0x40, byte);
+
+ /* Disable the timeout mechanism on LPC */
+ byte = pci_read_config8(dev, 0x48);
+ byte &= ~(1 << 7);
+ pci_write_config8(dev, 0x48, byte);
+
+ /* Disable LPC MSI Capability */
+ byte = pci_read_config8(dev, 0x78);
+ byte &= ~(1 << 1);
+ byte &= ~(1 << 0); /* Keep the old way. i.e., when bus master/DMA cycle is going
+ on on LPC, it holds PCI grant, so no LPC slave cycle can
+ interrupt and visit LPC. */
+ pci_write_config8(dev, 0x78, byte);
+
+ /* bit0: Enable prefetch a cacheline (64 bytes) when Host reads code from SPI rom */
+ /* bit3: Fix SPI_CS# timing issue when running at 66M. TODO:A12. */
+ byte = pci_read_config8(dev, 0xBB);
+ byte |= 1 << 0 | 1 << 3;
+ pci_write_config8(dev, 0xBB, byte);
+
+ cmos_check_update_date();
+
+ /* Initialize the real time clock.
+ * The 0 argument tells cmos_init not to
+ * update CMOS unless it is invalid.
+ * 1 tells cmos_init to always initialize the CMOS.
+ */
+ cmos_init(0);
+}
+
+static void hudson_lpc_read_resources(device_t dev)
+{
+ struct resource *res;
+
+ /* Get the normal pci resources of this device */
+ pci_dev_read_resources(dev); /* We got one for APIC, or one more for TRAP */
+
+ /* Add an extra subtractive resource for both memory and I/O. */
+ res = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0));
+ res->base = 0;
+ res->size = 0x1000;
+ res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE |
+ IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
+
+ res = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0));
+ res->base = 0xff800000;
+ res->size = 0x00800000; /* 8 MB for flash */
+ res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE |
+ IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
+
+ /* Add a memory resource for the SPI BAR. */
+ fixed_mem_resource(dev, 2, SPI_BASE_ADDRESS / 1024, 1, IORESOURCE_SUBTRACTIVE);
+
+ res = new_resource(dev, 3); /* IOAPIC */
+ res->base = IO_APIC_ADDR;
+ res->size = 0x00001000;
+ res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
+
+ compact_resources(dev);
+}
+
+static void hudson_lpc_set_resources(struct device *dev)
+{
+ struct resource *res;
+
+ /* Special case. SPI Base Address. The SpiRomEnable should STAY set. */
+ res = find_resource(dev, 2);
+ pci_write_config32(dev, SPIROM_BASE_ADDRESS_REGISTER, res->base | SPI_ROM_ENABLE);
+
+ pci_dev_set_resources(dev);
+}
+
+/**
+ * @brief Enable resources for children devices
+ *
+ * @param dev the device whos children's resources are to be enabled
+ *
+ */
+static void hudson_lpc_enable_childrens_resources(device_t dev)
+{
+ struct bus *link;
+ u32 reg, reg_x;
+ int var_num = 0;
+ u16 reg_var[3];
+ u16 reg_size[1] = {512};
+ u8 wiosize = pci_read_config8(dev, 0x74);
+
+ /* Be bit relaxed, tolerate that LPC region might be bigger than resource we try to fit,
+ * do it like this for all regions < 16 bytes. If there is a resource > 16 bytes
+ * it must be 512 bytes to be able to allocate the fresh LPC window.
+ *
+ * AGESA likes to enable already one LPC region in wide port base 0x64-0x65,
+ * using DFLT_SIO_PME_BASE_ADDRESS, 512 bytes size
+ * The code tries to check if resource can fit into this region
+ */
+
+ reg = pci_read_config32(dev, 0x44);
+ reg_x = pci_read_config32(dev, 0x48);
+
+ /* check if ranges are free and not use them if entry is just already taken */
+ if (reg_x & (1 << 2))
+ var_num = 1;
+ /* just in case check if someone did not manually set other ranges too */
+ if (reg_x & (1 << 24))
+ var_num = 2;
+
+ if (reg_x & (1 << 25))
+ var_num = 3;
+
+ /* check AGESA region size */
+ if (wiosize & (1 << 0))
+ reg_size[0] = 16;
+
+ reg_var[2] = pci_read_config16(dev, 0x90);
+ reg_var[1] = pci_read_config16(dev, 0x66);
+ reg_var[0] = pci_read_config16(dev, 0x64);
+
+ for (link = dev->link_list; link; link = link->next) {
+ device_t child;
+ for (child = link->children; child;
+ child = child->sibling) {
+ if (child->enabled
+ && (child->path.type == DEVICE_PATH_PNP)) {
+ struct resource *res;
+ for (res = child->resource_list; res; res = res->next) {
+ u32 base, end; /* don't need long long */
+ u32 rsize, set = 0, set_x = 0;
+ if (!(res->flags & IORESOURCE_IO))
+ continue;
+ base = res->base;
+ end = resource_end(res);
+ /* find a resource size */
+ printk(BIOS_DEBUG, "hudson lpc decode:%s, base=0x%08x, end=0x%08x\n",
+ dev_path(child), base, end);
+ switch (base) {
+ case 0x60: /* KB */
+ case 0x64: /* MS */
+ set |= (1 << 29);
+ rsize = 1;
+ break;
+ case 0x3f8: /* COM1 */
+ set |= (1 << 6);
+ rsize = 8;
+ break;
+ case 0x2f8: /* COM2 */
+ set |= (1 << 7);
+ rsize = 8;
+ break;
+ case 0x378: /* Parallel 1 */
+ set |= (1 << 0);
+ set |= (1 << 1); /* + 0x778 for ECP */
+ rsize = 8;
+ break;
+ case 0x3f0: /* FD0 */
+ set |= (1 << 26);
+ rsize = 8;
+ break;
+ case 0x220: /* 0x220 - 0x227 */
+ set |= (1 << 8);
+ rsize = 8;
+ break;
+ case 0x228: /* 0x228 - 0x22f */
+ set |= (1 << 9);
+ rsize = 8;
+ break;
+ case 0x238: /* 0x238 - 0x23f */
+ set |= (1 << 10);
+ rsize = 8;
+ break;
+ case 0x300: /* 0x300 -0x301 */
+ set |= (1 << 18);
+ rsize = 2;
+ break;
+ case 0x400:
+ set_x |= (1 << 16);
+ rsize = 0x40;
+ break;
+ case 0x480:
+ set_x |= (1 << 17);
+ rsize = 0x40;
+ break;
+ case 0x500:
+ set_x |= (1 << 18);
+ rsize = 0x40;
+ break;
+ case 0x580:
+ set_x |= (1 << 19);
+ rsize = 0x40;
+ break;
+ case 0x4700:
+ set_x |= (1 << 22);
+ rsize = 0xc;
+ break;
+ case 0xfd60:
+ set_x |= (1 << 23);
+ rsize = 16;
+ break;
+ default:
+ rsize = 0;
+ /* try AGESA allocated region in region 0 */
+ if ((var_num > 0) && ((base >=reg_var[0]) &&
+ ((base + res->size) <= (reg_var[0] + reg_size[0]))))
+ rsize = reg_size[0];
+ }
+ /* check if region found and matches the enable */
+ if (res->size <= rsize) {
+ reg |= set;
+ reg_x |= set_x;
+ /* check if we can fit resource in variable range */
+ } else if ((var_num < 3) &&
+ ((res->size <= 16) || (res->size == 512))) {
+ /* use variable ranges if pre-defined do not match */
+ switch (var_num) {
+ case 0:
+ reg_x |= (1 << 2);
+ if (res->size <= 16) {
+ wiosize |= (1 << 0);
+ }
+ break;
+ case 1:
+ reg_x |= (1 << 24);
+ if (res->size <= 16)
+ wiosize |= (1 << 2);
+ break;
+ case 2:
+ reg_x |= (1 << 25);
+ if (res->size <= 16)
+ wiosize |= (1 << 3);
+ break;
+ }
+ reg_var[var_num++] =
+ base & 0xffff;
+ } else {
+ printk(BIOS_ERR, "cannot fit LPC decode region:%s, base=0x%08x, end=0x%08x\n",
+ dev_path(child), base, end);
+ }
+ }
+ }
+ }
+ }
+ pci_write_config32(dev, 0x44, reg);
+ pci_write_config32(dev, 0x48, reg_x);
+ /* Set WideIO for as many IOs found (fall through is on purpose) */
+ switch (var_num) {
+ case 3:
+ pci_write_config16(dev, 0x90, reg_var[2]);
+ /* fall through */
+ case 2:
+ pci_write_config16(dev, 0x66, reg_var[1]);
+ /* fall through */
+ case 1:
+ pci_write_config16(dev, 0x64, reg_var[0]);
+ break;
+ }
+ pci_write_config8(dev, 0x74, wiosize);
+}
+
+unsigned long acpi_fill_mcfg(unsigned long current)
+{
+ /* Just a dummy */
+ return current;
+}
+
+static void hudson_lpc_enable_resources(device_t dev)
+{
+ pci_dev_enable_resources(dev);
+ hudson_lpc_enable_childrens_resources(dev);
+}
+
+static struct pci_operations lops_pci = {
+ .set_subsystem = pci_dev_set_subsystem,
+};
+
+static struct device_operations lpc_ops = {
+ .read_resources = hudson_lpc_read_resources,
+ .set_resources = hudson_lpc_set_resources,
+ .enable_resources = hudson_lpc_enable_resources,
+#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
+ .write_acpi_tables = acpi_write_hpet,
+#endif
+ .init = lpc_init,
+ .scan_bus = scan_static_bus,
+ .ops_pci = &lops_pci,
+};
+static const struct pci_driver lpc_driver __pci_driver = {
+ .ops = &lpc_ops,
+ .vendor = PCI_VENDOR_ID_AMD,
+ .device = PCI_DEVICE_ID_ATI_SB900_LPC,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-03 08:51:20 +0000